1 /* $NetBSD: defer-internal.h,v 1.1.1.1 2013/12/27 23:31:17 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef DEFER_INTERNAL_H_INCLUDED_ 29 #define DEFER_INTERNAL_H_INCLUDED_ 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #include "event2/event-config.h" 36 #include "evconfig-private.h" 37 38 #include <sys/queue.h> 39 40 struct event_callback; 41 typedef void (*deferred_cb_fn)(struct event_callback *, void *); 42 43 /** 44 Initialize an empty, non-pending event_callback. 45 46 @param deferred The struct event_callback structure to initialize. 47 @param priority The priority that the callback should run at. 48 @param cb The function to run when the struct event_callback executes. 49 @param arg The function's second argument. 50 */ 51 void event_deferred_cb_init_(struct event_callback *, ev_uint8_t, deferred_cb_fn, void *); 52 /** 53 Change the priority of a non-pending event_callback. 54 */ 55 void event_deferred_cb_set_priority_(struct event_callback *, ev_uint8_t); 56 /** 57 Cancel a struct event_callback if it is currently scheduled in an event_base. 58 */ 59 void event_deferred_cb_cancel_(struct event_base *, struct event_callback *); 60 /** 61 Activate a struct event_callback if it is not currently scheduled in an event_base. 62 63 Return true iff it was not previously scheduled. 64 */ 65 int event_deferred_cb_schedule_(struct event_base *, struct event_callback *); 66 67 #ifdef __cplusplus 68 } 69 #endif 70 71 #endif /* EVENT_INTERNAL_H_INCLUDED_ */ 72 73